115 lines
4.0 KiB
C
115 lines
4.0 KiB
C
|
|
/*============================================================================
|
|
|
|
This C header file is part of the SoftFloat IEEE Floating-Point Arithmetic
|
|
Package, Release 3e, by John R. Hauser.
|
|
|
|
Copyright 2017 The Regents of the University of California. All rights
|
|
reserved.
|
|
|
|
Redistribution and use in source and binary forms, with or without
|
|
modification, are permitted provided that the following conditions are met:
|
|
|
|
1. Redistributions of source code must retain the above copyright notice,
|
|
this list of conditions, and the following disclaimer.
|
|
|
|
2. Redistributions in binary form must reproduce the above copyright notice,
|
|
this list of conditions, and the following disclaimer in the documentation
|
|
and/or other materials provided with the distribution.
|
|
|
|
3. Neither the name of the University nor the names of its contributors may
|
|
be used to endorse or promote products derived from this software without
|
|
specific prior written permission.
|
|
|
|
THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS "AS IS", AND ANY
|
|
EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
|
|
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, ARE
|
|
DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
|
|
DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
|
|
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
|
|
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
|
|
ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
|
|
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
|
|
=============================================================================*/
|
|
|
|
#ifndef opts_GCC_h
|
|
#define opts_GCC_h 1
|
|
|
|
#ifdef INLINE
|
|
|
|
#include <stdint.h>
|
|
#include "primitiveTypes.h"
|
|
|
|
#ifdef SOFTFLOAT_BUILTIN_CLZ
|
|
|
|
INLINE uint_fast8_t softfloat_countLeadingZeros16( uint16_t a )
|
|
{ return a ? __builtin_clz( a ) - 16 : 16; }
|
|
#define softfloat_countLeadingZeros16 softfloat_countLeadingZeros16
|
|
|
|
INLINE uint_fast8_t softfloat_countLeadingZeros32( uint32_t a )
|
|
{ return a ? __builtin_clz( a ) : 32; }
|
|
#define softfloat_countLeadingZeros32 softfloat_countLeadingZeros32
|
|
|
|
INLINE uint_fast8_t softfloat_countLeadingZeros64( uint64_t a )
|
|
{ return a ? __builtin_clzll( a ) : 64; }
|
|
#define softfloat_countLeadingZeros64 softfloat_countLeadingZeros64
|
|
|
|
#endif
|
|
|
|
#ifdef SOFTFLOAT_INTRINSIC_INT128
|
|
|
|
INLINE struct uint128 softfloat_mul64ByShifted32To128( uint64_t a, uint32_t b )
|
|
{
|
|
union { unsigned __int128 ui; struct uint128 s; } uZ;
|
|
uZ.ui = (unsigned __int128) a * ((uint_fast64_t) b<<32);
|
|
return uZ.s;
|
|
}
|
|
#define softfloat_mul64ByShifted32To128 softfloat_mul64ByShifted32To128
|
|
|
|
INLINE struct uint128 softfloat_mul64To128( uint64_t a, uint64_t b )
|
|
{
|
|
union { unsigned __int128 ui; struct uint128 s; } uZ;
|
|
uZ.ui = (unsigned __int128) a * b;
|
|
return uZ.s;
|
|
}
|
|
#define softfloat_mul64To128 softfloat_mul64To128
|
|
|
|
INLINE
|
|
struct uint128 softfloat_mul128By32( uint64_t a64, uint64_t a0, uint32_t b )
|
|
{
|
|
union { unsigned __int128 ui; struct uint128 s; } uZ;
|
|
uZ.ui = ((unsigned __int128) a64<<64 | a0) * b;
|
|
return uZ.s;
|
|
}
|
|
#define softfloat_mul128By32 softfloat_mul128By32
|
|
|
|
INLINE
|
|
void
|
|
softfloat_mul128To256M(
|
|
uint64_t a64, uint64_t a0, uint64_t b64, uint64_t b0, uint64_t *zPtr )
|
|
{
|
|
unsigned __int128 z0, mid1, mid, z128;
|
|
z0 = (unsigned __int128) a0 * b0;
|
|
mid1 = (unsigned __int128) a64 * b0;
|
|
mid = mid1 + (unsigned __int128) a0 * b64;
|
|
z128 = (unsigned __int128) a64 * b64;
|
|
z128 += (unsigned __int128) (mid < mid1)<<64 | mid>>64;
|
|
mid <<= 64;
|
|
z0 += mid;
|
|
z128 += (z0 < mid);
|
|
zPtr[indexWord( 4, 0 )] = z0;
|
|
zPtr[indexWord( 4, 1 )] = z0>>64;
|
|
zPtr[indexWord( 4, 2 )] = z128;
|
|
zPtr[indexWord( 4, 3 )] = z128>>64;
|
|
}
|
|
#define softfloat_mul128To256M softfloat_mul128To256M
|
|
|
|
#endif
|
|
|
|
#endif
|
|
|
|
#endif
|
|
|